Система уравнений. Помогите пожалуйста ❤ 1)3х-у=7
2х+3у=1
2) 2×(3х+2у)+9=4х+21
2х+10=3-(6х+5у)
3) 5х-3у=8
15х-9у=8
2х+3у=1
2) 2×(3х+2у)+9=4х+21
2х+10=3-(6х+5у)
3) 5х-3у=8
15х-9у=8
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